Ink roller brake for printing presses



Aug. 8, 1931. F. E. HUGHES 1,819,329

INK ROLLER BRAKE FOR PRINTING PRESSES Filed May 25, 1929 InventorEederick E Hug/la s l atentecl Aug. 18, 1931 r I STATES PATENT OFFICE.

FREDERICK E. HUGHES, F TORONTO, ONTARIO, CANADA INK ROLLER BRAKE FORPRINTING IPRESSES Application filed May 25, 1929. 'Serial' 1T0. 366,021.

The principal objects of the invention are in a flange ring 12, formedin half sections to overcome the diiiiculty of unequal distriwhichissecured by the screws 13 to the boss bution of ink on the inking plateof print- 14 of the inking roller operating arm 15 ing presses and toprovide a simple form of which is a part of the standard pressstrucdevice which may be readily attached to the ture and carries theroller in its movement to 55 press and which is very reliable andpositive and-from the fountain roll 16 which is arin its operation.ranged on the ink font 17, said arm 15 be- The principal feature of theinvention ing pivoted on the frame 18 and operated consists in the novelconstruction and arby the link rod 19.

rangement of a brake member operatively A pair of. semi-circular members20' and 00 connected with the inking roller whereby 21 hinged togetherencircle the brake drum said roller is brought into contact with the 1between its flanges and the inner faces fountain roll with a new pointof contact at thereof are preferably provided with a suiteach movementof the roller between the able friction lining 22.

fountainand th inking l t The-hinge pin 23 connecting the members 5 Inthe drawings, Figure 1 is an elevational and 21 extends through thehinge ends of view of a portion of a printing press showing a pair ofU-shaped members 24 and 25 and a part of. the frame, the ink reservoir,the hardened steel rollers 26 and 27 aremounted fountain roll and theimproved brake mechin said U-shaped members on the pins 28 and 20 anism.29 extending transversely therethrough, the 70 Figure 2 is an enlargedperspective view. peripheries of the rollers extending beyond of thebrake device. the faces ofthe U-shapedmembers farthest Figure 3 is'asectional view'of the brake from the members 20 and 21. mechanism takenon the line 33 of Figure A bracket 30 is rigidly mounted on the 25 2.frame 18 of the press and is formed with an '75 Y The inking mechanismof certain types of upwardly extending arm 31 having a curved printingpresses has for many years been face 32 which is concentric to the pivot33 subject to a defect which many have enof the arm 15.. Depressions 34and 35 are deavoured to overcome by various devices to formed at theupper and lower ends of the 30 check the spinning of the ink roller asit face 32. leaves the inking plate. The brake members 20 and 21 areeach In the device herein shown a small cylinformed with a lug 20 and 21in which are drical brake drum 1 is rotatably mounted threaded thesetscrews 36 and 37 provided on the shaft 2 of the inking roller 3 andit withleck nuts 38 and 39 'toengage said lugs.

35 is preferably formed with side flanges land A. compression spring 40is arranged be- I a hole 5 therethrough. A clamp 6 is secured tween theouter free ends of the brake memon the end of the shaft 2 and isprovided 'bers 20'and 21,being seated in recesses in said with a springbutton latch 7 which enters 'ends'and said spring tends to force thememthe hole 5 and thus causes the drum to turn bers 20 and 21 apart sothat they will not 40 with the shaft. The head of the button 7 grip-thedrum arranged therebetween. is formed with a notch 8 in its peripheryand The set screws are adjusted so that the a pin 9 secured in the clamppasses through heads thereof engage the outward sides of the notch whenthe latch is locked to the the U shaped members 24 and 25 and said drumand said pin holds the latch disenmembers, when the rollers-26 and 27are in 45 gaged by pulling the latch outwardly and engagement with theconcentric face 32 of the turning same so that the pin engages'the arm31, force thebrake members 21 and 22 underside of the head. together. togrip the brake drum to hold the The drum 1 is provided with a boss 10 onink roller from rotating. When either of the its inner side which isformed with an aunurollers 26 or 27 drop into the depression 34 50 largroove 11 and said boss is rotatably held and 35 the pressure againstthe brake mem- 109 roller 3 only a part of a revolution.

bers is relieved and the spring 40 immediately spreads them apart torelease the braking grip and allow the ink roller 3 to rotate.

In the operation of this device, the arm swings downwardly on its pivotto bring the ink roller 3 into contact wit-h the roll 16 and just priorto the roller 3 engaging the roll 16, the roller 27 on the U-shapedmember drops into the lower depression on the arm 31 releasing the brakeand allowing the roller 3 to turn with'the fountain roll. The arm 15then swinging upward carries the roller 3 away from the roll 16 and theroller 27 is lifted out of the depression 35 and the brake is appliedand the roller 3 is held from rotation until the arm 15 approaches theupward limit of its movement and the roller26 of the upper U-shapedmember drops into the depression 34 again releasing the brake so thatthe ink roller 3 will rotate freely when engaged by the reciprocatinink'distributor plate, which is not shown as its structure andarrangement are well known.

The rotation of the ink roller in its engagement with the inking plateis uniform and as the movement of the roller is positively arrested asthe roller leaves the ink plate it is held in a fixed position till itengages the slowly rotating fountain roll which turnsrtfiie 1s operationthus advances the ink roller the 7 distance of its travel in rotationwith each contact with the fountain roll which ensures the ink rollerbeing brought into contact at a different point in its periphery at eachstroke of the ink roller arm, consequently the ink will be applied to adifferent part of the roller at each stroke and a uniform distributionwill be effected.

The clamp member with its latch enables the releasing of the roller 3for cleaning by simply lifting the latch and turning it and by turningthe latch until the pin 9 slips into the notch 8 the brake is again inoperation.

What I claim as my invention is 1. An ink roller brake for printingpresses, comprising, an oscillating roller, means carried with saidroller adapted to be operated to close around the roller shaft to arrestthe rotative movement thereof, and means for operating said arrestingmeans periodically.

2. In a printing press, the combination with the oscillating inkingroller, of relatively movable braking members carried with the inkingroller adapted to free the inking roller at the ends of its oscillatingmovement and hold it from'rotation during the remainder of its movement.

3. In a printing press, the combination with the frame, the inkingroller and the pivotal oscillating support therefor, of relative- I lymovable braking members carried by said oscillating roller support forholding the ink- YRS ing roller from rotation, and means arranged on theframe adapted to operate said relatively movable members individuallyand to release same at the ends of the oscillating movement.

4. In a printing press, the combination with the inking roller andoscillating means for carrying same, of a brake mechanism comprising anarticulated member mounted on said oscillating means adapted to arrestthe rotation of the inking roller, and means adapted to operate andrelease the movable portions of said articulated brake member at theends of the oscillating movement of the inking roller to control therotation of said roller. I

5. In a printing press, the combination with the frame, the inkingroller and the pivotal oscillating support therefor, of a pair of hingedbraking members adapted to arrest the rotation of the inking roller, arigid bracket member having a surface concentric with the pivot of theinking roller support, and members operatively connected with saidhinged braking members and engaging said concentric surface to apply thebrake to arrest the rotation of the inking roller.

6. In a. printing press, the combination with the frame, an oscillatingmember pivoted on the frame, and an inking roller rotatably mounted insaid oscillating member, of-

a brake drum mounted on said inking roller, a brake member encirclingsaid drum, a pair of arms pivotally mounted and operatively connectedwith said brake, rollers mounted on each of said arms, a rigid brackethavinga concentric surface adapted to engage said rollers and apply thebrake to arrest the rotation of the inking roller, said arms releasingsaid brake at the upper and lower extremities of the oscillatingmovement.

7 In a printing press, the combination with the frame, an oscillatingmember pivoted on the frame, and an inking roller rotatably mounted insaid oscillating member, of a brake drum mounted on said inking roller,a pair of brake arms hinged together and extending around said drum, aspring holding the free ends of said arms apart, a pair of memberspivotally mounted on the hinge connection of said brake members, aroller mounted on each of the latter members, set screws mounted in thebrake members engaging the pivotal members connected thereto, and afixed member having a concentric surface adapted to engage said rollersto operate said pivotal members to force the brake mem bers into brakingengagement with the drum, said fixed member having depressions at theends to release the brake.

8. In a printing press, the combinationwith the frame, an oscillatingmember pivoted on the frame, and an'inking rol er rotatably mounted insaid oscillating member,

of a brake drum mounted on said inking roller, a clamp secured to theinking roller shaft, a spring latch on said clamp engaging said brakedrum to carry it with the ink roller, a brake engaging said drum, andmeans for operating said brake to arrest the rotation of the inkingroller during the maj or portion of the oscillating movement andreleasing it at the ends.

9. In an ink roller brake for printing presses comprising thecombination with the ink fountain and the ink distributing mechanism, ofan ink roller, means for carrying said roller from the ink fountain tothe ink distributor, and means carried with the ink roller aoapted toarrest the roller from rotation as it leaves the distributor and holdsame from rotation until it approaches the ink fountain to effect thecontact of the ink roller with the fountain at a different point in itscircumference following each oscillating movement.

10. In a printing press, the combination with the oscillating inkingroller, of relatively movable braking members comprising pivotallyconnected members carried with the inking roller adapted to free theinking roller at the ends of its oscillating movement and hold it fromrotation during the remainder of its movement.

11. In a printing press, the combination with the frame, an oscillatingmember pivoted on the frame, and an inking roller rotatably mounted insaid oscillating member, of a brake drum mounted on said inking roller,a pair of brake arms hinged together and extending around said drum, andsupported thereby in a floating manner, and means for operatingsaidbrake arms to grip or release said brake drum during its oscillatingmovement.

12. In a device of the class described, in combination, a rotatableshaft mounted to oscillate bodily between two end positions,non-rotatable means normally loosely carried by said shaft, and meansfor tightening said first named means upon said shaft during its bodilymovement between said end positions to control the rotation of saidshaft.

13. In a device of the class described, in combination, a rotatableshaft mounted to oscillate bodily between two end positions, and meansloosely carried by a said shaft When occupying said end positions andand adapted to control the rotation thereof during its bodily movementbetween said end positions.

14. In a device of the class described, in combination, a rotatableshaft mounted to oscillate bodily between two end positions, meansloosely carried by said shaft when occupying said end positions, andmeans for causing said first named means to prevent free rotation ofsaid shaft during its bodily movement between said end positions.

15. In an inking mechanism for printing presses or the like, whichincludes a fountain roller, a member to be inked, a ductor roll arrangedto oscillate bodily between said fountain roller and said member and torotate in contact therewith, and an axle for said ductor roll, a memberloosely carried by said axle when said ductor roll is in contact withsaid fountain roller or said 1ne1nher to be inked and adapted to preventrotation of said axle and ductor roll when they are in intermediatepositions.

16. In an inking mechanism for printing presses or the like, whichincludes a fountain roller, a member to be inked, and a ductor rollmounted on a shaft for bodily oscillation between said fountain rollerand said member and for rotation in contact therewith, in combination, amember loosely carried by said shaft when said ductor roll is in contactwith said fountain roller or said member to be inked, and means forcausing said member carried by said shaft to prevent rotation of saidshaft during bodily oscillation thereof.

FREDERICK E. HUGHES.

